In this paper, the small fatigue crack behavior in titanium alloy TC4 under different stress levels was investigated. Single-edge-notch tension specimens were axially fatigued with stress ratio of 0.1 at room temperature. Results show that the naturally initiated cracks nucleate from the α/β interfaces. When the crack is below a critical length of ∼200 µm, crack growth rates exhibit large fluctuations and temporary retardations due to microstructure effects. But once the crack length exceeds ∼200 µm, the fluctuations in crack growth rates die down and the crack grows more rapidly. There is no distinct effect of stress level on small crack growth rate. A linear relationship exists between the total fatigue life and crack initiation life.


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    Titel :

    An investigation of small fatigue crack behavior in titanium alloy TC4 under different stress levels


    Beteiligte:
    Zhu, Lei (Autor:in) / Hu, Xuteng (Autor:in) / Jiang, Rong (Autor:in) / Song, Yingdong (Autor:in) / Qu, Shoudao (Autor:in)


    Erscheinungsdatum :

    01.12.2019


    Format / Umfang :

    12 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




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